The story in this video thread shows what seems to be YT being able to allow video submitters (e.g. big corporate "partner" ones like Warner) to restrict access to the videos they provide based on regions (probably for comedy central style regional copyright)

As JAPR has posted the link to the original warner YT video, we can try to confirm if this is so. In which case, we may need to disallow some YT submitter videos, as they will cause "This video is unavailable." for some of us.

EDIT:

Can people for all around the world confirm if this YT URL works, and if not, what message they get, posting the message and their location in this thread.

http://www.youtube.com/watch?v=tWHkluThDXQ